Hi all, I understood the origin of the issue with my previous 3D sample: wxPython window must be shown before the V3d_Viewer is inited. I attached the script wxDisplay.py that is able from which I produced the screenshots below. I also changed my sphere to a torus: it's difficult to see a sphere rotate around his center unless your eyes are 5cm far from the screen!
Once launched ("python wxDisplay.py"), you can:
- hit "W" key to set display mode to wireframe,
- hit "S" to switch to shaded mode,
- left click and move to rotate,
- middle click and move to pan,
- right click and move to zoom in/out.
The script is quite small: only 150 lines of code, easy to understand
and to extend. Enjoy this sample with your own shapes!
Thomas
<<attachment: ATT2623133.jpg>>
<<attachment: ATT2623134.jpg>>
from OCC import *
import wx
import wx.glcanvas
class GraphicsCanva3D(wx.glcanvas.GLCanvas):
def __init__(self, parent):
wx.glcanvas.GLCanvas.__init__(self, parent)
wx.EVT_SIZE(self, self.OnSize)
wx.EVT_IDLE(self, self.OnIdle)
wx.EVT_MOVE(self, self.OnMove)
wx.EVT_SET_FOCUS(self, self.OnFocus)
wx.EVT_KILL_FOCUS(self, self.OnLostFocus)
wx.EVT_MAXIMIZE(self, self.OnMaximize)
wx.EVT_LEFT_DOWN(self, self.OnLeftDown)
wx.EVT_RIGHT_DOWN(self, self.OnRightDown)
wx.EVT_MIDDLE_DOWN(self, self.OnMiddleDown)
wx.EVT_LEFT_UP(self, self.OnLeftUp)
wx.EVT_RIGHT_UP(self, self.OnRightUp)
wx.EVT_MIDDLE_UP(self, self.OnMiddleUp)
wx.EVT_MOTION(self, self.OnMotion)
wx.EVT_KEY_DOWN(self,self.OnKeyDown)
self._3dDisplay = None
self._inited = False
self._leftisdown = False
self._middleisdown = False
self._rightisdown = False
def Init3dViewer(self):
self._3dDisplay = Display3d()
self._3dDisplay.Init(self.GetHandle())
self._inited = True
def OnKeyDown(self,evt):
key_code = evt.GetKeyCode()
if key_code==87:#"W"
self._3dDisplay.SetDisplayModeWireFrame()
elif key_code==83:#"S"
self._3dDisplay.SetDisplayModeShaded()
def OnSize(self, event):
if self._inited:
self._3dDisplay.Repaint()
def OnMaximize(self, event):
if self._inited:
self._3dDisplay.Repaint()
def OnMove(self, event):
if self._inited:
self._3dDisplay.Repaint()
def OnIdle(self, event):
if self._inited:
self._3dDisplay.Repaint()
def Test(self):
if self._inited:
self._3dDisplay.Test()
def OnFocus(self, event):
if self._inited:
self._3dDisplay.Repaint()
def OnLostFocus(self, event):
if self._inited:
self._3dDisplay.Repaint()
def OnPaint(self, event):
if self._inited:
self._3dDisplay.Repaint()
def ZoomAll(self, evt):
self._3dDisplay.Zoom_FitAll()
def Repaint(self, evt):
if self._inited:
self._3dDisplay.Repaint()
def OnLeftDown(self, evt):
self._leftisdown = True
self.dragStartPos = evt.GetPosition()
self._3dDisplay.StartRotation(self.dragStartPos.x,self.dragStartPos.y)
def OnLeftUp(self,evt):
self._leftisdown = False
def OnRightUp(self,evt):
self._rightisdown = False
def OnMiddleUp(self,evt):
self._middleisdown = False
def OnRightDown(self, evt):
self._rightisdown = True
self.dragStartPos = evt.GetPosition()
self._3dDisplay.StartRotation(self.dragStartPos.x,self.dragStartPos.y)
def OnMiddleDown(self, evt):
self._middleisdown = True
self.dragStartPos = evt.GetPosition()
self._3dDisplay.StartRotation(self.dragStartPos.x,self.dragStartPos.y)
def OnMotion(self, evt):
pt = evt.GetPosition()
# ROTATE
if self._leftisdown:
dx = pt.x - self.dragStartPos.x
dy = pt.y - self.dragStartPos.y
self._3dDisplay.Rotation(pt.x,pt.y)
# DYNAMIC ZOOM
if self._rightisdown:
self._3dDisplay.Repaint()
self._3dDisplay.DynamicZoom(abs(self.dragStartPos.x),
abs(self.dragStartPos.y), abs(pt.x), abs(pt.y))
self.dragStartPos.x = pt.x
self.dragStartPos.y = pt.y
# PAN
elif self._middleisdown:
dx = pt.x - self.dragStartPos.x
dy = pt.y - self.dragStartPos.y
self.dragStartPos.x = pt.x
self.dragStartPos.y = pt.y
self._3dDisplay.Pan(dx,-dy)
if __name__=="__main__":
class AppFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1, "pythonOCC 0.98 test - Thomas
Paviot", style=wx.DEFAULT_FRAME_STYLE,size = (640,480))
self.canva = GraphicsCanva3D(self)
app = wx.PySimpleApp()
wx.InitAllImageHandlers()
frame = AppFrame(None)
frame.Show()
frame.canva.Init3dViewer()
frame.canva._3dDisplay.SetDisplayModeShaded()
# Draw and display a torus
S = BRepPrimAPI_MakeTorus(400,100)
shape = S.Shape()
frame.canva._3dDisplay.DisplayShape(S.Shape())
app.SetTopWindow(frame)
app.MainLoop()
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